# What does Claude use?

Claude (claude.com) shows public evidence of 10 tools, according to runsonwhat (last checked 2026-10-20).

- LinkedIn: https://www.linkedin.com/company/anthropicresearch

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Website code |  |
| [Google Cloud](https://www.runsonwhat.com/reverse/gcp) | Hosting & Cloud | Custom domain |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code |  |
| [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code |  |
| [MCP Registry](https://www.runsonwhat.com/reverse/mcp-registry) | AI | DNS verification records |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Atlassian Statuspage](https://www.runsonwhat.com/reverse/statuspage) | Monitoring | Custom domain |  |
| [Segment](https://www.runsonwhat.com/reverse/segment) | Analytics | Website code |  |

## Go-to-market

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Sanity](https://www.runsonwhat.com/reverse/sanity) | Website & CMS | Website code |  |

## Recent changes at Claude

- 2026-10-20: started using [MCP Registry](https://www.runsonwhat.com/reverse/mcp-registry)

## FAQ

### What tools does Claude use?

As of October 2026, runsonwhat has found 10 tools at Claude (claude.com) in public records. Edge & Hosting: Cloudflare and Google Cloud. Application: React, Next.js and MCP Registry. Data & Observability: Atlassian Statuspage and Segment. Go-to-market: Sanity. Last checked October 20, 2026.

### What cloud does Claude run on?

Claude uses Google Cloud for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Google Cloud through a subdomain that points at Google Cloud. Google Cloud is used by 75,828 companies runsonwhat tracks.

### What analytics tools does Claude use?

Claude uses Segment for analytics, according to runsonwhat (October 2026). runsonwhat found Segment through Segment code on claude.com. Segment is used by 6,635 companies runsonwhat tracks.

### What is Claude's website built with?

Claude uses Sanity for its website, according to runsonwhat (October 2026). runsonwhat found Sanity through Sanity code on claude.com. Sanity is used by 4,967 companies runsonwhat tracks.

### What monitoring tools does Claude use?

Claude uses Atlassian Statuspage for monitoring, according to runsonwhat (October 2026). runsonwhat found Atlassian Statuspage through a subdomain that points at Atlassian Statuspage. Atlassian Statuspage is used by 6,654 companies runsonwhat tracks.

### Does Claude use Cloudflare?

Yes. runsonwhat found Cloudflare at Claude through DNS records that point at Cloudflare and code on claude.com. Cloudflare is a CDN & Edge tool used by 703,857 companies runsonwhat tracks.

### Does Claude use AI tools?

Yes. runsonwhat has found MCP Registry at Claude; MCP Registry, for example, through a DNS verification record for MCP Registry. AI services called only from servers leave no public trace, so Claude may use more AI tools than these.

### Has Claude changed tools recently?

Yes. On runsonwhat's rechecks, Claude started using MCP Registry (latest on October 20, 2026). A change counts only between two checks of claude.com done the same way.

### Which companies have a tech stack similar to Claude's?

The companies with the stacks most like Claude's are AppsFlyer, Truthifi, Paper Lantern and Philip Ilic Thomas, according to runsonwhat (October 2026). Each shares 3 to 5 tools with Claude, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what Claude uses?

runsonwhat reads public records only. Of the 10 tools at Claude, 4 were found through code on claude.com, 3 through DNS records, 2 through subdomains that point at the vendor and 1 through website configuration files. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and claude.com about monthly.


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Source: runsonwhat, https://www.runsonwhat.com/company/claude.com (updated October 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.